Conditioning Composition for Hair Comprising Optical Brightener

Abstract

The present invention is related to a conditioning composition for hair comprising optical brightener. The conditioning composition of the present invention can be in the form of a shampoo, cleansing-conditioning composition, or in the form of a conditioner used after use of cleansing compositions. The preferred optical brightener is disodium distyrylbiphenyl disulfonate.

1 - 14 . (canceled) 
   
   
       15 . A process for brightening hair wherein first a shampoo composition comprising at least one dicarboxylic and/or hydroxycarboxylic acid and at least one conditioning compound is applied to hair and rinsed off and subsequently a conditioner composition comprising at least one hair conditioning compound and at least one dicarboxylic and/or hydroxycarboxylic acid is applied to the hair and after a processing time between 1 to 10 min, it is rinsed off from the hair and the hair is dried, wherein both shampoo and conditioner compositions have a pH lower than 4.5 and comprise an optical brightener, wherein application of the shampoo and the conditioner increases deposition of the optical brightener onto the hair. 
   
   
       16 . The process according to  claim 15 , wherein the optical brightener is disodium distyrlbiphenyl disulfonate and present in the composition at a concentration of 0.001 to 1% by weight, calculated to total composition. 
   
   
       17 . A method of increasing deposition of an optical brightener onto hair, the method comprising:
 preparing a composition comprising at least one hair conditioning agent, at least one optical brightener and at least one hydroxycarboxylic acid and/or dicarboxylic acid and has a pH value less than 4.5   applying the composition to hair, wherein application of the composition to the hair increases deposition of the optical brightener onto the hair.   
   
   
       18 . The method according to  claim 17 , further comprising:
 rinsing off the composition from the hair.   
   
   
       19 . The method according to  claim 17 , further comprising:
 allowing the composition to remain in the hair.   
   
   
       20 . The method according to  claim 17 , wherein the optical brightener is disodium distyrlbiphenyl disulfonate and present in the composition at a concentration of 0.001 to 1% by weight, calculated to total composition. 
   
   
       21 . The method according to  claims 17 , wherein the composition comprises at least one surfactant selected from anionic, nonionic and amphoteric or zwitterionic surfactants at a concentration of 1 to 50% by weight, calculated to the total composition. 
   
   
       22 . The method according to  claim 17 , wherein the composition comprises at least one anionic surfactant and at least one non-ionic surfactant. 
   
   
       23 . The method according to  claim 21 , wherein the composition comprises additionally at least one amphoteric surfactant. 
   
   
       24 . The method according to  claim 17 , wherein the composition comprises a concentration of one or more hydroxycarboxylic acid and/or dicarboxylic acid in the range of 0.1 to 5% by weight, calculated to the total composition. 
   
   
       25 . The method according to  claim 17 , wherein the composition comprises malic acid and/or lactic acid as hydroxycarboxylic acid. 
   
   
       26 . The method according to  claim 17 , wherein the composition comprises hydroxycarboxylic acid at concentration of 0.5 to 5% by weight with the condition that it comprises malic acid at a concentration of not less than 0.5% by weight, calculated to total composition. 
   
   
       27 . The method according to  claim 17 , wherein the composition comprises only malic acid as a hydroxycarboxylic acid and/or dicarboxylic acid. 
   
   
       28 . The method according to  claim 17 , wherein the composition comprises at least one cationic polymer and/or at least one cationic surfactant as a conditioner. 
   
   
       29 . The method according to  claim 17 , wherein the composition comprises organic solvents at a concentration of less than 10% by weight, calculated to total concentration. 
   
   
       30 . The method according to  claim 17 , wherein the composition is an emulsion and comprises at least one fatty alcohol.